/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/DenseMatrix.h
E.g., this can be used to solve constraint equations of the form J.I.Jt.X = B where J is a Jacobian (Jt its transpose), I is an Inverse mas matrix, and B the residual. In this case, I is symmetric positive definite, and therefore so is JIJt.
template<int32 T_EA, int32 T_EB, int32 T_EX> static bool SolvePositiveDefinite ( const [TDenseMatrix](API\Runtime\Chaos\Chaos\TDenseMatrix)< T_EA > & A, const [TDenseMatrix](API\Runtime\Chaos\Chaos\TDenseMatrix)< T_EB > & B, [TDenseMatrix](API\Runtime\Chaos\Chaos\TDenseMatrix)< T_EX > & X )